Tire Size Box

295/50R18 vs 295/60R18

295/60R18 compared with 295/50R18

+7.8% diameter, 0.0" width

295/60R18 is 31.94" tall vs 29.61". More than the 3% rule of thumb, so check carefully before switching.

29.6"18" rim5.8"11.6" wide
295/50R18 (solid) compared with 295/60R18 (dashed outline), drawn to scale

With 295/60R18 tires, when your speedometer says 60 mph you are really going

64.7 mph

295/60R18 is +2.32 inches (+7.8%) in overall diameter. That is more than the 3% most shops and makers recommend.

295/50R18295/60R18Difference%
Overall diameter29.61"31.94"+2.32"+7.8%
Section width11.61"11.61"0.00"0.0%
Sidewall height5.81"6.97"+1.16"+20.0%
Circumference93.04"100.33"+7.30"+7.8%
Revolutions per mile681.0631.5−49.5−7.3%

Speedometer difference

If your vehicle came with 295/50R18 and you fit 295/60R18, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.6 mph+1.6 mph
30 mph32.4 mph+2.4 mph
40 mph43.1 mph+3.1 mph
50 mph53.9 mph+3.9 mph
60 mph64.7 mph+4.7 mph
65 mph70.1 mph+5.1 mph
70 mph75.5 mph+5.5 mph
75 mph80.9 mph+5.9 mph
80 mph86.3 mph+6.3 mph

Each size on its own

Questions

Which is bigger, 295/50R18 or 295/60R18?
295/60R18 is taller by 2.32 inches (31.94" vs 29.61"). 295/50R18 is the same width.
Can I replace 295/50R18 with 295/60R18?
It is not recommended without checking carefully. The diameter difference is +7.8%, more than the 3% most shops and makers allow. It will throw off the speedometer and may affect ABS, stability control and clearance.
How much will 295/60R18 change my speedometer?
When your speedometer reads 60 mph with 295/60R18 fitted (calibrated for 295/50R18), your real speed is 64.7 mph. Your odometer will under-count miles by about 7.8%.
Will 295/60R18 lift my vehicle?
Ride height changes by half the diameter difference: +1.16 inches of ground clearance at the axle.

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